Motorola M12 Oncore Guia do Utilizador descarregar pdf (Página 94)

Chapter 5 - I/O Commands

DEFINE USER DATUM MESSAGE (@@Ap)

Applicability: M12+ and M12+ Timing receivers

The M12+ can accommodate one user defined datum stored as ID number 50. The Define User

Datum command allows the user to define the constants used for this datum.

A datum is defined by a semi-major axis, an inverse flattening constant, and an offset from the

center of mass of the earth, given as delta-X, delta-Y, and delta-Z

parameters.

If the user has not supplied the receiver with custom datum parameters, Datum 50 will contain

WGS-84 parameters, identical to those stored in the receiver's default datum, Datum 49.

Default value: WGS-84 parameters

Related command: Datum Select Message (@@Ao)

Legacy Code Compatibility: The @@Ap command has been implemented in an identical fashion

on virtually all Motorola Oncore receivers.

Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05

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Motorola M12 Oncore Guia do Utilizador Página 94